worth it

Recently we tested out jeans to see if the most expensive option really is the most flattering.
Exhbit A: Gap Jeans, approx $90

Exhibit B: Banana Republic Jeans, approx $145

Exhibit C: Seven For All Mankind, approx $235

Are the most expensive pair the most flattering? They do make the legs look thinner so overall they are the crowd favourite, but the Gap jeans make the buns look pretty good too.
Whatd'ya think? Do expensive jeans really make your butt look better?